Cure non-interference
Polyester and epoxy composites cure by catalysed reaction, so pigments must not inhibit or accelerate the peroxide-initiated cure or cause soft spots.
Applications
Pigments for Fiberglass FRP
Pigment recommendations for fiberglass frp with technical checks and export enquiry support.
Fibre-reinforced plastic and gel-coated composites are frequently outdoor, structural products, so organic pigments used in FRP resins and gel coats are chosen mainly for weather fastness, compatibility with unsaturated polyester and epoxy chemistry, and no interference with the peroxide cure. Pigments are usually supplied as dispersions in a compatible resin carrier for even colour. Buyers should confirm the pigment does not inhibit or accelerate cure, is weatherfast for marine, tank and panel uses, resists the styrene monomer environment, and disperses without settling in the pigmented gel coat.
At a glance
What Pigments for Fiberglass FRP covers
Outdoor weather fastness
Boats, tanks and panels live outdoors, so specify weatherfast pigments that resist fading, chalking and colour shift over long exposure.
Resin-carrier dispersions
Pigments are best supplied predispersed in a compatible polyester or epoxy carrier for even colour and no settling in gel coats.
Styrene and solvent resistance
Gel coats contain styrene monomer, so pigments must resist bleeding or dissolving in that reactive solvent environment during cure and service.
Recommended pigments
High-demand grades to consider
A starting shortlist of export-grade organic pigments relevant to Pigments for Fiberglass FRP. Open any grade for shade, fastness and packing detail, or send your requirement for a matched recommendation.
Blue Pigments
Phthalocyanine Blue Beta
Pigment Blue 15:3High-strength beta blue for export-grade paints, inks, plastics, and masterbatch.
View export grade Yellow PigmentsPigment Yellow 74
PY74Arylide yellow grade for decorative coatings and water-based systems.
View export grade Red PigmentsPigment Red 170
PR170Strong naphthol red for coatings, plastics, and masterbatch.
View export grade Pigment PastesEpoxy Pigment Paste
Epoxy PasteStable epoxy paste for floor coatings and resin systems.
View export grade Green PigmentsPhthalocyanine Green 36
Pigment Green 36Yellow-shade green for plastics, coatings, PVC, and export applications.
View export gradeExplore more
Related pages & export hub
Answers
Pigments for Fiberglass FRP — frequently asked questions
Can organic pigments interfere with composite curing?
Yes, some pigments can inhibit or accelerate the peroxide-catalysed cure of polyester and epoxy resins, leading to soft spots, undercure or altered gel times. This is why FRP pigment selection is validated against the specific resin and catalyst system, and cure behaviour is checked before production use.
Why must FRP pigments be weatherfast?
FRP products such as boat hulls, tanks, roofing and panels usually serve outdoors for years. Weak pigments fade, and the gel-coat surface may chalk. Weatherfast organic pigments matched to the shade keep the coloured surface looking consistent and protect the appearance of the finished composite.
How are pigments added to gel coats and resins?
They are typically supplied as dispersions in a compatible polyester or epoxy carrier, so colour blends evenly into the gel coat or laminating resin without settling or forming streaks. Predispersed pigment pastes reduce mixing effort and give more uniform, reproducible colour than dry powder in composite work.
Does styrene in the resin affect pigment choice?
It can. Unsaturated polyester gel coats contain styrene monomer, a strong reactive solvent, so pigments must resist bleeding or dissolving in it. Selecting styrene-resistant grades prevents colour migration and streaking. Always confirm the pigment is stable in the specific resin system, including its monomer content.
Buyer knowledge base
Pigments for Fiberglass FRP: a quick sourcing guide
A short, practical brief for procurement and technical teams — how the right pigment grade is matched, documented, packed and shipped from India, and the fastest way to a quotation.
Right grade, first time
Matched to your substrate, process temperature and fastness targets — not just the colour name.
Repeatable batches
Shade and strength held to approved reference standards, order after order.
Samples before bulk
Evaluation samples with documents so QA and R&D approve shade and strength first.
Clear commercials
MOQ, lead time, Incoterms and packing agreed up front, before sampling begins.